All levels have been created for the second demo now.
There are still some things which have to be done (see first post) and there will be no C3 booth about this hack this time.
This may also be the last time I update this thread before the final release of demo 2!
Here is the 4th Castle, Aros' Underworld:
Link to the video
Screenshots:

This castle starts outside. The transparent things are YI gusties. You have to be careful in this area.

First "real" room. Both FG and BG drawn from scratch by me, sprites have been partly altered, some are completely self-drawn.

Vine fun and thwomps which explode after hitting the ground!

Second room beneath the Earth. There's a vertical auto-scroll here.

Uh yeah small cutscene... doesn't say anything intersting in the video either because it concerns the plot and I don't want to reveal stuff. The foe Bowser speaks with is the 4th boss, Aros. You can probably see it way better in-game.
Please comment

Check out
my hack thread (Taomb)
my twitch (irregular schedule)

Exits done: >50, Overworld: 99.8%
Play through Taomb Demo 3
Taomb is almost finished. It will definitely be relased in 2025 after 17 years of work!